EP 0673043 A1 19950920 - Superconducting lead assembly for a cryocooler-cooled superconducting magnet.
Title (en)
Superconducting lead assembly for a cryocooler-cooled superconducting magnet.
Title (de)
Supraleitende Zuführung für einen tieftemperaturgekühlten supraleitenden Magnet.
Title (fr)
Amenée supraconductrice pour un aimant supraconducteur avec réfrigération cryogénique.
Publication
Application
Priority
US 20928794 A 19940314
Abstract (en)
A superconducting magnet lead assembly for a cryocooler-cooled superconducting magnet having a design current of between generally 50 and 250 amperes. A DBCO (Dysprosium Barium Copper Oxide), YBCO (Yttrium Barium Copper Oxide), or BSCCO (Bismuth Strontium Calcium Carbonate) superconducting lead has its ends flexibly, dielectrically, and thermally connected, one end to the generally 30 to 50 Kelvin first stage and the other end to the generally 8 to 30 Kelvin second stage of the cryocooler coldhead. The superconducting lead has a generally constant cross-sectional area along its length. The design current, the lead's length, and the lead's cross-sectional area are chosen such that the design current times the lead's length divided by the lead's cross-sectional area is between generally 720 and 880 amperes per centimeter for a DBCO or YBCO lead and is between generally 180 and 220 amperes per centimeter for a BSCCO lead. The superconducting lead will not itself precipitate a magnet quench (i.e., the superconducting lead does not conduct significant heat between the coldhead stages during the superconductive mode), and the superconducting lead will survive a lead quench from other causes (i.e., the superconducting lead does conduct the resistive heat buildup to the coldhead stages during a lead quench) and thus be acceptable for commercial applications.
IPC 1-7
IPC 8 full level
H01L 39/04 (2006.01); H01B 12/02 (2006.01); H01F 6/00 (2006.01); H01F 6/06 (2006.01)
CPC (source: EP US)
H01F 6/065 (2013.01 - EP US); Y10S 505/844 (2013.01 - EP US); Y10S 505/879 (2013.01 - EP US); Y10S 505/893 (2013.01 - EP US)
Citation (search report)
- [YA] EP 0580498 A1 19940126 - GEC ALSTHOM ELECTROMEC [FR]
- [A] US 4209658 A 19800624 - HILAL MOHAMED A [US]
- [YA] K.G. HERD ET AL: "Grain-aligned YCBO superconducting current leads for conduction-cooled applications", IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, vol. 3, no. 1, pages 1667 - 1670, XP011503722, DOI: doi:10.1109/77.233915
- [A] PATENT ABSTRACTS OF JAPAN vol. 013, no. 312 (E - 788) 17 July 1989 (1989-07-17)
- [A] D.U. GUBSER ET AL: "Superconducting current leads of YBCO and Pb-BSCCO", IEEE TRANSACTIONS ON MAGNETICS, vol. 27, no. 2, pages 1854 - 1857
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
US 5396206 A 19950307; EP 0673043 A1 19950920; JP H0851015 A 19960220
DOCDB simple family (application)
US 20928794 A 19940314; EP 95301498 A 19950308; JP 5309495 A 19950314